A NEW ORTHORHOMBIC PHASE IN AL-CU-CO REPRESENTING A RATIONAL APPROXIMANT TO THE DECAGONAL QUASI-CRYSTALLINE PHASE

被引：30

作者：

LIAO, XZ ^{[1
]}

KUO, KH ^{[1
]}

ZHANG, H ^{[1
]}

URBAN, K ^{[1
]}

机构：

[1] FORSCHUNGSZENTRUM JULICH, FORSCHUNGSZENTRUM, INST FESTKORPERFORSCH, W-5170 JULICH 1, GERMANY

来源：

PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES | 1992年 / 66卷 / 04期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1080/13642819208220121

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A new orthorhombic phase has been found by transmission electron microscopy in Al65Cu15Co20. Its crystal structure can be considered as a rational approximant to the structure of the decagonal quasicrystal forming in the same alloy. The lattice parameters are a = 1.97 nm, b = 0.40 nm and c = 2.33 nm. The new phase was observed in the immediate local vicinity of the decagonal phase. In between the two phases a transition region was observed which consists of twin-related micro-domains. The observations were analysed in terms of a quasicrystal-to-crystal transition. Application of linear phason strain theory yielded an evolution of the diffraction spot intensities in good agreement with the experimental observations.

引用

页码：549 / 558

页数：10

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